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The Wnt/β-catenin pathway can activate melanocyte stem cells and may help regenerate hair follicles.

Scientists created early-stage hairs from mouse cells that grew into normal, pigmented hair when implanted into other mice.

Dermoscopic examination helps diagnose different types of hair loss conditions by showing specific patterns.

An elderly man's hair grew back after a treatment that transferred healthy gut bacteria.

Different sports can cause specific skin conditions that need proper diagnosis and treatment.

A scarring hair loss condition mainly affects middle-aged women of African descent, impacting their quality of life, with treatments more effective when started early.

Melanocytes appear in fetal skin early, but their development details are still unclear.

Skin diseases, especially psoriasis, greatly affect people's quality of life, similar to chronic diseases.

The ARTAS robotic system for hair restoration is efficient with fewer cuts than manual methods, but it's limited to certain hair types and can still leave scars.

The SAFE System for hair transplants results in low damage to follicles and could make the procedure suitable for more patients.

Human skin and hair color variation is mainly due to melanin produced by a few genes, with melanin protecting against sun damage.

Delayed ejaculation is a complex issue caused by psychological, biological, and lifestyle factors, requiring a holistic treatment approach.

The first in-prison dermatology clinic in the U.S. faced challenges and found certain skin conditions common among inmates, with rare cases of serious skin cancer.

Understanding and treating hair disorders in different ethnic groups requires knowledge of specific hair care practices and hair characteristics.

Hair color is determined by different melanins and changes with age.

Men have more tryptophan in their hair than women, and it increases with age and is higher in darker and grey or white hair.

Chemical and physical treatments like bleaching, dyeing, and UV radiation damage both Caucasian and Afro-ethnic hair.

Dermoscopy helps accurately diagnose temporal triangular alopecia, avoiding unnecessary treatments.

Obese Hispanic women with PCOS are at higher risk for metabolic problems than non-Hispanic white women.

An 8-year-old boy with hair-pulling disorder had a bald patch that was confirmed not to be a fungal infection and was treated with therapy.

A cancer drug caused unusual hair growth on a 100-year-old man's scalp and eyelashes.

Children with alopecia areata have different trichoscopic features than adults, including more empty follicular openings and pigtail hairs.

Rac1 is essential for proper hair structure and color.

Trichostasis spinulosa can look like acne but usually affects adults, not children.

Melanin density affects hair color, and this method can help in cosmetic assessments and diagnosing hair diseases.

A medication may help with hair growth in psoriasis, and a skin condition might be linked to a specific bacteria.

T-cell reconstitution after thymus transplantation can cause hair whitening and loss.

Finasteride 5 mg effectively reduces urinary symptoms and PSA levels in men with enlarged prostates, with few sexual side effects.

A 6-year-old girl in the U.S. had a rare scalp infection caused by *Trichophyton soudanense*.

The engineered skin substitute helped grow skin with hair on mice.